Update:

I thought I was going to get a yellow slurry stone but the seller was kind enough to look through his stock and found a combination slurry stone as well.

I'll let you guys know when I get it.

It's too bad that all my 4 razors are shave ready right now.

I'm curious to see if I could go from Coticule/slurry - BB/slurry/ Coticule with water to get a razor from butter knife sharp to shavre ready.

I might just play around with my Double Arrow. Better make mistakes on that one than on one of my more expensive razors I suppose.